[Kst] Curve polygons

[Peter Kümmel]

nicolas.brisset at free.fr wrote:
>> Many thanks Nicolas! 1) is the answer: When I disable opengl the curve
>> drawing bug is gone. Bug 225347 is still there. I saw the curve drawing bug
>> only because I had a look at 225347. I strongly hope this bug is more on our side
>> then it is easier to find.
> Glad I could help somehow. Regarding this bug, I'm pretty sure it is on kst side as it used to work prior to the update refactoring. This is independent from the Qt version, but not from the platform (aka trunk always has the problem under Windows with all Qt versions I tested, but it works under Linux). Or even if there is a Qt bug, at least it should be possible to work around it.

I'm also sure its a kst bug. Maybe only due to the decimal separator.

> 
>> Later I will try other (older) Qt versions. Maybe we should file a bug
>> report, but then we should provide a small sample program.
> As mentioned, from my experiments it happens with older Qt versions as well. I guess we're doing something "wrong" somewhere, which just happens to work under Linux. The funny thing is that it used to work...

Here it is clearly a bug on the Qt or maybe graphic card driver side:
If you resize the painted polygons down to 100 the bug is gone and most of the curve, too ;)
Increasing the number of polygons makes things then worse. Typically there are about 1000 polygons for
the gyrodata curve.

Peter

> 
> Thanks for your support. I hope we can soon reach a status where kst 2 is really usable under Windows.
> 
> Nicolas
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